/Engine/Source/Runtime/Json/Public/Dom/JsonObject.h
Get the field named FieldName as an array of enums. Returns false if it doesn't exist or any member is not a string.
template<typename TEnum> bool TryGetEnumArrayField ( const [FString](API\Runtime\Core\Containers\FString) & FieldName, [TArray](API\Runtime\Core\Containers\TArray)< TEnum > & OutArray ) const